Canyonlands National Park, Utah

1500 Slide Spectrum Series (1987 - 1995)

Cumulative Frequency Summary

Spectrum Sequence #	Representative Visibility Condition Summary			Representative Cumulative Frequency of Reconstructed Extinction IMPROVE Aerosol Data (1988 - 1997)
	dv	bext (Mm^-1)	VR (km)
1 of 13	1	12	340	< 1%
2 of 13	2	12	330	< 1%
3 of 13	3	13	290	< 1%
4 of 13	4	15	260	1%
5 of 13	4	16	250	2%
6 of 13	6	18	220	5%
7 of 13	7	21	190	10%
8 of 13	9	24	160	30%
9 of 13	11	30	130	60%
10 of 13	12	33	120	70%
11 of 13	13	36	110	80%
12 of 13	17	56	70	97%
13 of 13	21	78	50	>99%

Prepared by Air Resource Specialists, Inc.

for the IMPROVE Program

1998